A 15-year-old gunman is under arrest for allegedly wounding a 9-year-old boy in an argument over a stolen bike at the Breukelen Houses in Canarsie Thursday.

The 15-year-old, whose name was withheld by police, was charged with assault.

The shooting took place after the victim, Ronnell Gurley, told his uncle of the theft.

They went hunting for the bike and found it in the possession of several teens.

An argument broke out and the 15-year-old pulled a gun and shot Gurley in the arm, police said.

In addition to the 15-year-old, police arrested Kimon Murray, 19, William Battle, 18, and Shindell Miller, 16, on charges related to the bike theft, police said.

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A gunman killed a man and wounded another outside a Sheepshead Bay barber shop.

The thug walked up to the men outside the shop on Avenue X near Haring Street at 10 a.m. yesterday and opened fire, putting a bullet in the chest of the 26-year-old victim and one in the leg of a 25-year-old man.

The gunman and an accomplice then jumped into a car and crashed two blocks away on Avenue V, cops said.

Both men were found hiding at the nearby Sheepshead Bay Houses, police said.

Charges were pending, said a spokesman for DA Charles Hynes.

Queens

An opportunistic thief who found a wallet helped herself to a $2,000 check and a credit card in Forest Hills, authorities said.

Inna Yangarber, 41, admitted to detectives she found a wallet around Feb. 20 and used the stolen credit card for nearly a month, sources said.

She also took a $2,000 check from the wallet, and cashed it at a Chase branch on Queens Boulevard, cops said.

Police busted Yangarber on June 16 on charges of grand larceny and identity theft, said a spokesperson for DA Richard Brown.

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A razor-wielding rage-aholic was arrested after slicing an acquaintance in Briarwood, cops said.

Danielle Cotton, 20, allegedly accosted the woman, pulled a razor and began flailing it on 87th Road near 150th Street on June 15 at 6 p.m., cops said.

“I’ll slice and dice these bitches,” she allegedly howled, then hurled a bowl at the foe, who wasn’t seriously injured.

Cotton was charged with assault.

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A gun-toting thug shot an acquaintance in the face in Flushing, authorities said.

Jasma Credle, 24, shot the woman in the left cheek in a residence on June 13 at 3:15 a.m., cops said.

Credle was charged with attempted murder and criminal possession of a weapon.